I've encrypted a couple of 10 letters words from https://www.bestwordlist.com/10letterwords.htm using a key of 10 characters. This is done using Vigenere cipher. Decrypt the cipher and give the key
Ciphertext: XRPEFGMHNL XDBEWUMHNL
How we can decipher when we have only 2n size ciphertext where n is the key size
Can you please explain how it can be done? Frequency analysis is not effective in this case as the ciphertext is really short...